var interval = 5000; 
var random_display = 0;
var image_dir = "../rotatorio/img/foto/gal/"
var timerID = -1;

for ( var i=0; i < imageArray.length; i++ ) {
	imageArray[i][0] = new imageItem(image_dir + imageArray[i][0]);
}

var number_of_image = imageArray.length;
ImageNum = number_of_image - 1;

function imageItem(image_location) {
	this.image_item = new Image();
	this.image_item.src = image_location;
}
function get_ImageItemLocation(imageObj) {
	return(imageObj.image_item.src)
}
function randNum(x, y) {
	var range = y - x + 1;
	return Math.floor(Math.random() * range) + x;
}
function getNextImage() {
	if (random_display) {
		ImageNum = randNum(0, number_of_image-1);
	}
	else {
		ImageNum = (ImageNum+1) % number_of_image;
	}
	var new_image = get_ImageItemLocation(imageArray[ImageNum][0]);
	return(new_image);
}

function getPrevImage() {
	ImageNum = (ImageNum-1+number_of_image) % number_of_image;
	var new_image = get_ImageItemLocation(imageArray[ImageNum][0]);
	return(new_image);
}

function prevImage(place) {
	var new_image = getPrevImage();
	document[place].src = new_image;
	document.getElementById("galeria_contador").innerHTML = (ImageNum+1) + "/" + number_of_image;
	var pie = imageArray[ImageNum][1];
	if ( imageArray[ImageNum][2] != "" ) {
		pie = "<a href=\"" + imageArray[ImageNum][2] + "\"><span  class=\"txt_piefotog\">" + pie + "</span></a>";
	}
	document.getElementById("galeria_pie_foto").innerHTML = pie;
	stopImage();
	var recur_call = "rotateImage('"+place+"')";
	timerID = setTimeout(recur_call, interval);
}

function rotateImage(place) {
	var new_image = getNextImage();
	document[place].src = new_image;
	document.getElementById("galeria_contador").innerHTML = (ImageNum+1) + "/" + number_of_image;
	var pie = imageArray[ImageNum][1];
	if ( imageArray[ImageNum][2] != "" ) {
		pie = "<a href=\"" + imageArray[ImageNum][2] + "\"><span  class=\"txt_piefotog\">" + pie + "</span></a>";
	}
	document.getElementById("galeria_pie_foto").innerHTML = pie;
	stopImage();
	var recur_call = "rotateImage('"+place+"')";
	timerID = setTimeout(recur_call, interval);
}

function stopImage() {
	if ( timerID > 0 ) {
		clearTimeout(timerID);
		timerID = -1;
	}	
}